Affiliation: | (1) Department of Genetic Science, Ibaraki Prefectural Institute for Public Health, 993-2, Kasahara-cho, Mito Ibaraki, 310-0852, Japan;(2) Infectious Disease Surveillance Center, National Institute of Infectious Diseases, 1-23-1, Toyama, Shinjuku Tokyo, 162-8640, Japan;(3) Department of Health and Welfare, Ibaraki Prefectural Government, 987-6, Kasahara-cho, Mito Ibaraki, 310-8555, Japan;(4) Mito Public Health Center, 993-2, Kasahara-cho, Mito Ibaraki, 310-0852, Japan;(5) Tsuchiura Public Health Center, 2-7-46, Shimotakatsu, Tsuchiura Ibaraki, 300-0812, Japan;(6) Koga Public Health Center, 6-22, Kitamachi, Koga Ibaraki, 306-0005, Japan;(7) Chikusei Public Health Center, 114, Koh, Chikusei Ibaraki, 308-0021, Japan;(8) Present address: Ibaraki Prefectural Central Hospital, 6528, Koibuchi, Kasama Ibaraki, 309-1793, Japan |